What happens in a war of attrition

The International Encyclopedia of the First World War defines attrition warfare as “the sustained process of wearing down an opponent so as to force their physical collapse through continuous losses in personnel, equipment and supplies or [wearing] them down to such an extent that their will to fight collapses.”

Explanation:

don't forget to brainllest:)

number 4. should be the correct answer

c. had saved colonel cresap's family from attack by other native americans.